Improvement in caps for coffin-screws



UNITED STATES.

PATENT OFFICE.

A. B. BAILEY, OF MIDDLE IIAD DAM, CONNECTICUTI.

IMPROVEMENT -IN CAPS FOR COl-'FIN-SCREWS'..

Specification forming part of Letters Patent No. 36,635, dated October'111, 19.62.

To @ZZ whom, t may concern:

Be it known that I, A. B. BAILEY, of Middle Haddam, in the county ofMiddlesex and State of Connecticut, have invented a new and useful'Improvement in Caps for Coffin- Screws; and I do hereby declare thatthe fellowing is a full, clear, and exact description of the san1e,reference being hadto the aecompanymg' drawings, making a lpart of thisspeciiication, in which- Figure lisa plan or'top' view of my inverntion. Fig. 2 is a vertical longitudinal sectionof the same, takenA inthe line x x, Fig. 1. Fig. 3 is a plan or top view of the cap'nowin use.Fig, 4 isa vertical longitudinal section of the same, taken in the liney y, Fig. 3.

Similar letters of reference indicate corresponding parts in the severaliigures.,

This invention. relates to an improvementV V1n the 'ornamental capswhich cover the screws soas to expose the same', the invention also'vlnsnrlng a snug orproper fit ofthe cap to its base.

To enable those skilled in the art to fully understand and construct mvinvention, I will proceed to describe'it. v

A represents the'base on which the capds secured. This base .may be oflozenge or other desired form, and itis swagedor struck up in propershape,and.with any ornamental coufiguration, by means ol' suitable dies.In the drawings this baseis shown of diamond or 1ozengeform, and it isconstructed with' a recess, a, to receive the head of the screw, (seeFig. 2,) in whichfihe screw-is shown in red.

B represents the cap, which may bev of circular or-.other desired form.This cap is provided at one sidewith a small ear orlug, b, through whichand the base A a rivet, c',

passes, which secures the cap to the base and ata point directly by theside ofthe recess a,

lso that the cap may be adjusted over the recess and the head of thescrew, asshewnclear- 1y in Figs. 2 and 4. v

The aboye-described `parts are not new, be-

ing precisely the same as the ordinary screw cap in common use. In theordinary arrangement, however, the cap B is-secured over the recessabyha'vingan ear orlug, d, at thelower edge of the cap at a pointdirectly opposite to the rivet ear or lug-b, and in the under side ofthis ear or lug d a hole or recess, e, is made to fit over a nipple, f,on the base when the cap is closed. (See Fig. 4.) This recess c andnipple f form the catch or fastening for the .cap to keep it in properposition over the reA cess e. ,It has been found, however, not to answerthe purpose, as the ear or lng d will, b y a very slight jar or knock,work 01T from the nipple f, as there is nothing. to hold the former downon the latter.

y improvement (shown'in Figs. i and 2) effectually obviates thisdifficulty. The ear or lug d is perfectly flat, (see Fig. 2,)and

1n the base A there is made a slit, y, at-the lowerpart o f a projectionor prominence, h, Y

on the base adjoining the recess a. In closing the cap B the ear or lugd passes into the slit g within the prominence h. By this arrange:

ment the cap B willbe securely held in posi' tion. Itis designed thatthe ear orlug d shall have a pressure upward to canse it to bear orpress suiciently hard against the upper sur face of the inner side ofthe prominence to preventait casually slipping out from the prominence,the latter atv the same keeping the cap Asnugly down on the base, so asto forni a tight iit or adjustment of the cap to the base all around therecess a. This result, it will be s een, is not attained by the old modeof fastening the cap.-

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The fiat ear or lug Z ofthe cap B, in combination with the slittedprominence l1 on the -base A, when arranged as shown, to forni a new andimproved catch or fastening for van ornamental cap for collie-screws, asherein set forth.

A. n. BAILEY,

`lVitnesses:

NVM. S. PURPLE, L. K. HUBBARD.

